Question

A plane passes through a fixed point (a, b, c). The locus of the foot of perpendicular to it from the origin is a sphere of radius

Answer 1

Correct option  (b)

Explanation:

Let P (α ,β,γ) be the foot of the perpendicular from the origin O on the given plane. The plane passes through A (a, b, c). Therefore,

Clearly, it is a sphere of